Board Thread:Pokémon Help/@comment-33885936-20180408225640/@comment-32358261-20180409073126

I’ll give you a brief explanation

Everstone will pass down the nature of the parent that holds it. Let’s say a ditto with an adamant nature holding an everstone breeds with a rowlet. The offspring will now have an adamant nature.

In iv breeding the reason why you use power items is because they will always pass down their respective iv. If a pidgey has 31iv in Speed while holding the power anklet, the offspring will also have 31iv in speed every time.

Another useful item for iv breeding is the destiny knot. This item will make the offspring have 5 random iv from both (the iv would come from both parents not just the one that holds the destiny knot) parents.